Water heater



w m 2 9 1.. 3 1 ...u r p A WATER HEATER 1921 2 Sheets-Sheet 1 Filed Nov. 15

April 13, 1926.

W. F. LAUTENSCHLAGER WATER HEATER Filed Nov. 15

2 Sheets-Sheet 2 ilttoznul To :all whom it may concern.'

Patented Apr. 13, 1926. Y'

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` l"WILLIANI', EIAUTENSCIILAGER, 0F CINCINNATI, oIIIo.-

1 Y WATER HEATER.

" Application 'nica November 15,1921. serial No. 515,388.

Be it knownthat I,;VVILLIAM F. LUTEN'- SCHLAGER, a citizen ofthe United States, and

residing .at Cincinnati, inthe Vcounty of Hamilton and State of Ohio, have invented a new and useful Improvement in l/Itater Heaters, of which the following specification is a full disclosure. L i

. My. invention relates to a hot-water heater,

the object being toprovide'an economicalV apparatus, avoidingv the usage-of wat-er coils,

the principle. of the constructioninvolving means providing an exposure. to the heat zone of a wide area water flow of relatively small cross section, the heating zone extendf ing practically for the verticallength of the heater, there being heating surfaces disposed at the bottom and'uponboth the inner and thefouter sides of this annular film-likecolumn of water which flows vertically upward from the base of the hatl Y More particularlywI provide an annular, relatively thin, cross section column of water exteriorly surrounded bythe products of combustion, with the attenuated water "if column insulated from the incomingv cold water column by means of an interiory annution showing a modified form ofthe invention.

The heater is Surrounded by a circumferential hollow body l, open at the top 2, for

the escape of the products of combustion, the

Y burner 3 being in the base, the body 1 'is either open or provided with openings admitting air to support combustion. Maximum heating surface and heat retention means are provided by peripherally lining the inner wall of said body with a refractory material or lire-brick 4.y In the upper portion of body 1 is vsuitably secured a T-coupling 5, constituting a water inlet and` outlet, the details of which will be later specified.

From the lower end of this member 5 is suspended the water heating tank 6,y the lower end 7 of which is positioned just above the burner, the end or base portion 7 constituting the initial water-heating chamber into which the cold water is delivered.

In the center of member 5 isv an elbow A.8, the upper end of which couples horizontally with the cold-water inlet `9, there being coupled to the. lower end of the elbow a cold- *1,580,208- :PATENT OFFICE;

water drop pipe k10, extending vertically through the.A center of the tank or drum 11 and 'communicating with: the chamber 7. at thel kbottom 1.4 vThis tank` or drum-11 is secured tothe upper and lower ends of this f droppipe'and withinthe tankv 6, concen'# trically therewith, constituting van annularv air insulating chamber surrounding the coldwater supply pipe 10, the space between the walls of tanks 6 and 11 ,constitutingfan an- A nular water heating conduit 12,' leading upwardly from chamber 7. This provides lan extended area or {ihn-like water body subliect-ed to' heat on the outside-and inside, the base chamber 7 thereof being directly over the burner.

the inlet elbow, and it is discharged through the off-take 13,v which` communicates horizontally withmember 5f;

The hot-water flows through this constricted heating annulus into thean-kv nular chamber of themember '5, surrounding.

' In the modified or amplified heating apl paratus of Fig. 4, the upper portionV of the vheater body 1 issurrounded by a' -wate1.

jacketed cap 14, suppliedwith water through the pipe'15, tapping the cold-water supply and discharging hot-water through the pipe 16, into the hot-water off-take 13, thus utllizing the heat which would otherwise be uselessly radiated. Y,

This provides a by-pass connection, of a restricted capacity across the inlet and outlet leads of the boiler, and exposes it tothe heat of the furnace surrounding the boiler,

for highly heating the water circulatingv through the furnace cap or top as a part of the bypass.y The .watercirculating through the by-pass 1s therefore heated to a lhigher degree than the water circulating through the boiler, whereby its velocity is increased.

This highly heated by-pass circulating water is injected into the boiler hot-water discharge or feed line at apoint where it will qualify as a water lifting ejector to boost or aid in increasing the velocity or water circulation through the boiler. The by-pass is provided with a valve 17 interposed in' the piping 1 6, for regulating the volume of water iow through the by-pass The water-jacketed cap, aside from. providing an enlarged heat exposed area in the by-pass line, serves as an insulating cover for the top ot the furnace and thereby reduces the radiation of heat into the room in Which the boiler is located. rlhis is of particular advantage, when the boiler is installed in the cellar oit' a dwelling, to`avoid excessive heating of the cellar atmosphere.

This apparatus can be economically manufactured, easily assembled, and provides a maximum heating` surface in relation to av maximum Water area ot relatively small dimension in cross section.

In practice, the operation of this' device is most economical, hot Water being produced Vin an extremely short time after lighting the burner, the possibilities ot' leakage being reduced to a minimum.

An additional advantage is in the avoidance of having Water coils exposed to the Haine or corrosive influence of the products of combustion.

Having described my invention, l claim:

1. A hot Water heater comprising a coupling' member having inlet and outlet passages therein, and inlet and outlet pipes connected with respective passages, a cold Water drop pipe connected with said coupling and inlet passage, an air tank concentrically attached to and surrounding said pipe torming' an insulation 'for said pipe, a second tank concentrically surroundingl said air tank attached to said coupling and forming with said air tank an attenuated annular Water heating chamber between said tanks, said chamber at its bottom connecting with said drop pipe and connecting at its top with said outlet passage, an open end heater body having a constricted upper end, said body having at its constricted portion an attenuated annular Water chamber, said chamber connected by relatively small inlet and outlet pipes with respective first mentioned inlet and outlet pipes, with the discharge end of the. second outlet pipe entering the first mentioned outlet pipe above the top of the heater body, and means for applying heat to the bottom of said second tank.

2. A hot Water heater, comprising an o-pen end heater body, said body near the top having a constriction therein, an attenuated annular Water chamber formed at said constricted portion, a coupler member at the top otl said body having inlet and outlet pastherein, a cold Water supply inlet attached to said inlet passage and centrally supported from said coupler member, an annular air tank attached to said cold Water inlet pipe, said tank supported by surrounding` and insulating said pipe, a heating tank suspended from said coupler member connected, with said coupler member, concentrically with said air tank and spaced therefrom to `form an attenuated annular chamber, said chamber in communication With the outlet passage ot said coupler member at thel top and in communication at the bottom with the loiver end of said inlet pipe, inlet and outlet pipes connecting with respective inlet and outlet passages of said coupler, and secondary inlet and outlet pipes connected respectively with said first mentioned inlet and outlet pipes and with said attenuated annular Water chamberat the top ot said heater body, and means for applying heat to the bottom of said heating tank.

In Witness whereof, I hereunto subscribe my name.

WILLIAM F. LAUTENSCHLAGER. 

